﻿#region Copyright (c) 2003 - 2008, Andreas Mueller
/////////////////////////////////////////////////////////////////////////////////////////
// 
// Copyright (c) 2003 - 2008, Andreas Mueller.
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// which accompanies this distribution, and is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// Contributors:
//    Andreas Mueller - initial API and implementation
//
// 
// This software is derived from software bearing the following
// restrictions:
// 
// Copyright (c) 1994
// Hewlett-Packard Company
// 
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee,
// provided that the above copyright notice appear in all copies and
// that both that copyright notice and this permission notice appear
// in supporting documentation.  Hewlett-Packard Company makes no
// representations about the suitability of this software for any
// purpose.  It is provided "as is" without express or implied warranty.
// 
// 
// Copyright (c) 1996,1997
// Silicon Graphics Computer Systems, Inc.
// 
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee,
// provided that the above copyright notice appear in all copies and
// that both that copyright notice and this permission notice appear
// in supporting documentation.  Silicon Graphics makes no
// representations about the suitability of this software for any
// purpose.  It is provided "as is" without express or implied warranty.
// 
// 
// (C) Copyright Nicolai M. Josuttis 1999.
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
// 
/////////////////////////////////////////////////////////////////////////////////////////
#endregion

using NStl.Linq;
using NUnit.Framework;
using NStl.Collections;
using NUnit.Framework.SyntaxHelpers;
using System.Collections.Generic;
using System;
using NStl.Exceptions;
using System.Collections;

namespace NStl.NUnit.ContainerFixture.HashMultiMap
{
    [TestFixture]
    public class EraseFixture : AbstractHashMultiMapFixture
    {
        [Test]
        public void EraseKey()
        {
            int oldCount = hmm.Count;
            Assert.That(hmm.Erase("0"), Is.EqualTo(1));
            Assert.That(hmm, Has.Count(oldCount - 1));
        }
        [Test]
        public void EraseKeyMultiple()
        {
            int oldCount = hmm.Count;
            Assert.That(hmm.Erase("2"), Is.EqualTo(3));
            Assert.That(hmm, Has.Count(oldCount - 3));
        }
        [Test]
        public void EraseKeyFails()
        {
            int oldCount = hmm.Count;
            Assert.That(hmm.Erase("42"), Is.EqualTo(0));
            Assert.That(hmm, Has.Count(oldCount));
        }
        [Test]
        [ExpectedException(typeof(ArgumentNullException))]
        public void EraseKeyFailsKeyIsNull()
        {
            hmm.Erase((string)null);
        }

        [Test]
        public void EraseAtPosition()
        {
            HashMultiMap<string, int>.Iterator pos = hmm.Find("2");
            hmm.Erase(pos);

            Assert.That(hmm.CountOf("2"), Is.EqualTo(2));
        }
        [Test]
        [ExpectedException(typeof(ArgumentNullException))]
        public void EraseAtPositionFailsIteratorIsNull()
        {
            HashMultiMap<string, int>.Iterator pos = null;
            hmm.Erase(pos);
        }
        [Test]
        [ExpectedException(typeof(NotTheSameInstanceException), ExpectedMessage = "Iterator points to different container!")]
        public void EraseAtPositionFailsIteratorIsFromDifferentContainer()
        {
            HashMultiMap<string, int>.Iterator pos = new HashMultiMap<string, int>().Begin();
            hmm.Erase(pos);
        }
        [Test]
        [ExpectedException(typeof(EndIteratorIsNotAValidInputException))]
        public void EraseAtPositionFailsIteratorIsEndIterator()
        {
            HashMultiMap<string, int>.Iterator pos = hmm.End();
            hmm.Erase(pos);
        }

        [Test]
        public void EraseRange()
        {
            ICollection fullRange = hmm.ToArray();
            const int amount = 3;
            HashMultiMap<string, int>.Iterator first = hmm.Begin();
            HashMultiMap<string, int>.Iterator last =
                (HashMultiMap<string, int>.Iterator) hmm.Begin().Add(amount);

            hmm.Erase(first, last);

            Assert.That(fullRange.Count - hmm.Count, Is.EqualTo(amount));
            Assert.That(hmm, Is.SubsetOf(fullRange));
        }

        [Test]
        [ExpectedException(typeof(ArgumentNullException))]
        public void EraseRangeFailsFirstIsNull()
        {
            hmm.Erase(null, hmm.Begin());
        }
        [Test]
        [ExpectedException(typeof(ArgumentNullException))]
        public void EraseRangeFailsSecondIsNull()
        {
            hmm.Erase(hmm.Begin(), null);
        }
        [Test]
        public void EraseRangeWhereFirstIsLast()
        {
            ICollection fullRange = hmm.ToArray();
            hmm.Erase(hmm.Begin(), hmm.Begin());

            Assert.That(hmm, Is.EqualTo(fullRange));
        }
    }
}
